MY21H02 - 12_1.0_19.10.2020
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Overview
3.1.4
Electric drive system
The pedelec is driven by muscle power applied to
the chain drive. The force which is applied by
pedalling in the direction of travel drives the front
chain wheel. The chain transmits the force onto
the rear chain wheel and then onto the rear wheel.
You can ride the pedelec like a normal bike at any
time, either by switching off the electric drive
system or changing the level of assistance to Off.
The same applies when the battery is empty.
Figure 11: Diagram of drive system
1
Direction of travel
2
Chain
3
Rear chain wheel
4
Front chain wheel
5
Pedal
The pedelec also has an integrated electric drive
system in addition to its drive system propelled by
muscle power. The electric drive system is made
up of 7 components:
Figure 12: Diagram of electric drive system
1
Headlight
2
On-board computer/operating element
3
Rechargeable battery
4
Rear light
5
Motor
3.1.4.1 Motor
As soon as the required muscle power from the
rider pedalling passes a certain level, the motor is
activated gently and assists the rider’s pedalling
motion. The motor force is determined by the set
level of assistance. The assistance depends on
the force applied to the pedals by the rider. Drive
system assistance is therefore only activated
when the rider pedals. This happens regardless of
the selected level of assistance. The motor
switches off automatically as soon as the rider no
longer pedals, the temperature is outside the
permitted range, there is an overload or the shut-
off speed of 25 km/h has been reached. If the
speed falls below 25 km/h, the assistance is
automatically activated again. A push assist
system can be activated. The push assist
continues to drive the pedelec as long as the rider
presses the plus button on the handlebars. The
speed can be a maximum of 6 km/h in this case.
3.1.4.2 Rechargeable battery
The lithium ion battery has an internal electronic
protection circuit, which is specifically designed
for the charger and the pedelec. The battery
temperature is monitored at all times. The battery
is protected against deep discharge,
overcharging, overheating and short circuit. In the
event of a hazard, a protective circuit switches the
battery off automatically. The battery also
switches to sleep mode for self-protection when
not used for a longer period. Its battery life can be
extended if the battery is well maintained and,
more importantly, stored at the correct
temperatures. The charging capacity will
decrease with age, even if the battery is
maintained properly. If the operating time is
significantly shortened after charging, this is a
sign that the battery has reached the end of its
useful life.
1
2
5
4
3
B
3
1
2
4
5
